Metal reinforcing and spacing bar.



I A. E. mm. METAL RBINI'ORCING-AND BPAQING BAR.

APPLICATION FILED JAN. 25,1911. I I 1,014,711 1, Patented Jan. 16, 1912.

, To all whom it may concern:

UNITED STATES PATENT OFFICE.

.anrnnn E. m'mmu, ors'r. LOUIS, aussounnassronon 'ro CORRUGATED nanconyarn, or $1. nomamrssomu, A conronnrron or mssoum.

METAL BEINFOBCING AND SPACING BAR.

Patented Jan. 16, 1912.

Application filed January 25, 1911. Serial No. 804,690.

Be it known that I, ALFRED E. LINDAU, a"

citizen of the United States, and aresident of the cityof St. Louis andState of M1s-. souri, have invented a new and useful Improvement' inMetal Reinforcing and Spac ing Bars,of which the following 1s aspecification.

My invention relates particularly to 1mprovements in reinforced concretecolumns,

' pipes, stacks, tanks or cylinders, but is applicable to any concretestructure in which spiral or looped metal reinforcement, or a pluralityof spaced parallel reinforclng bars,

is used 1n connection with longitudinal tension bars. The object of mylnventlon 1s to prov1de an improved means for securing the metalreinforcement and the tension bars in spaced relationship in the formsor molds preparatory to placing therein the matrix of concrete in theprocess of erectang reinforced concrete columns and like structures.

Another object of my invention is the provision of a simple, secure andrigid mechanical connection between adjacent reinforcing bars, andonewhich may readily be -made after the bars are placed in the forms.

vA further object of my invention is the production of reinforcing bars,formed by rolling or rolling and punching, which shall be of such shapeas to enable the use of a separate spacing means for properly assemblingthe reinforcement in the forms to be dispensed with. I also desire toproduce a tension bar adapted for use as a spacing "means which .issuitable for transportation without being boxed or crated, and which canbe shipped in fixed lengths andcutup at the place of use to suit thework in hand.

Other objects of my invention will be more fully set forth in connectionwith the accompanying drawings forming a part of this specification, andwill be more particularly pointed out in the claims.

In the drawings accompanying this speci-- fication, in which likenumerals are used to designate like parts throughout the several views:Figure 1 is a section on the line 11 in Fig. 2; Fig. 2 is a partial viewin side elevation of two of my improved bars used in connection withspiral reinforcement which is shown partly broken away; Fig. 3

is a partial view in side elevation of my improved tension and spacingbar; and Fig. 41s a section onthe line 4-4 in Fig. 3..

In metal-reinforced concrete columns and similar structures it iscustomary to use longitudinal tension members arranged near the surfaceof the column and extending parallel with its longitudinal axis inconnection' comes 'distorted or misplaced during the operation offilling in the forms with, concrete, and thus the finished structure isimpaired. a

The reinforcing bars illustrated in them:- companying drawing comprise amain body portion having longitudinal ribs'on diametrically oppositesides thereof and transverse ribs arranged at intervals along thesurface of the bar and extending from one longitudinal rib to the other.Mounted on one of these longitudinal ribs and extending outwardlytherefrom is a thin longitudinal flange 13 which has a series of notchesspaced apart along its outer edge. Two'or more of these bars 11 arearranged in parallel relationship and the spiral or looped reinforcementl2 assembled around them with the several loops thereof positioned inthe notches 14. These notches are of greater depth than the thickness ofthe reinforcement, being formed of such depth that the corners of theflanges 13 adjacent thereto' project out beyond the section of greatestWidth of the looped reinforcement positioned therein, so that thesecorners can easily be mashed down orbent in, as shown at 15 in Fig. 2,by a blow from a hammer to embrace the loops and thus secure them in thenotches. This is a comparatively simple operation easily carried out byunskilled labor, and insures notonly that the' reinforcement shall bespaced properly with respect to the longitudinal tension bars and thatthe longitudinal tension bars shall be. held very little danger of thereinforcement becoming detached from the longitudinal tension bars orbeing accidentally misplaced, .on account of this strong and-secure formof;

connection between thenng; n I 1 7 It fis. gwidentv that my improvedtension 7 described herein, as'for example, with Spaced parallelreinforcing bars as used in floor lsjpr arches,' .vvhich forms I havethought unnecessaryito 'shovv' and describe. I "otfvvish to belimited tothe particu-' d;above,f-but vvhat 'l claim as my ins "njdz desire"securegbyg Letters 1 Pat-1 ure'sk comprisinga a tension bar ingcomfonvvitlr loopedreinforcement,said-ten having};diametricallyi o positejlon "ribs and transverse ribsi -at inter -1ng providg'd. with-fa"'thinHflange-V having spaced notches in the edge thereof in which areseateditheloops of said reinforcement, 'said notchesfbeing of such depththat the Jadjacentcorners of said flange overlapthe- *s'pac'ing barcan'be used] with other" urine of reinforcement than that shown and.

'bodiment of my invention shown" and relnforcing unit f0r concrete}sides of the'loops seated therein, said corners being turned in toembrace the loops.

2. A metal reinforcement for concrete structures comprising paralleltension bars having diametrically opposite l ongitudinal ribs andtransverse ribs at intervals extending "fronijone longitudinal rib tothe other,

withfa' thin flange having spaced notches notches and supported theother,yone" of. .said longitudinal ribs be- I tches' thereinf adapted toreceive metal relforcment, said notches being. of such hapeifo'rmcorners on the flange, adapt-- retain it in position in the notches.

Signed at St: Louis, Missouri, this 23rd day of January, 1911.

- Witnesses:

A. M. HoLcoMBE, M. A. SHELTON.

therein, -an'd transverse reinforcing elements :vals extending; from onelongitudinal rib to.

ingjprovided ;;with a thin. flange I having:

ALFRED LINDAU;

one .ofsaid'longitudinal ribs being provided 1 n I I v 7 "edtobebent'over-the said reinforcement to" als ext dingjfr om-onelongitudinal rib to- *e-.:ather,- oneZ-of' said "longitudinal ribs be-.1

